<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh+'px'}">
				<block v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active?'active':'']" @click="activeChange(i)">{{item.cat_name}}</view>
				</block>
				
			</scroll-view>
			<!-- 右侧滑动区域 -->
			<scroll-view class="right-scroll-view" scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
					<view class="cate-lv2-title">
						/ {{item2.cat_name}} /
					</view>
					<view class="cate-lv3-list">
						<!-- 三级分类分项 -->
						<view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<image :src="item3.cat_icon"></image>
							<!-- 三级分类文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				// 当前设备可用的高度
				wh:0,
				cateList:[],
				active:0,
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad() {
			// 获取当前设备信息
			const sysInfo = uni.getSystemInfoSync()
			// console.log(syncInfo)
			// 获取当前设备屏幕
			this.wh = sysInfo.windowHeight - 50
			console.log(this.wh)
			
			this.getCateList()
		},
		methods:{
			// 获取分类列表的数据
			async getCateList(){
				const {data:res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !== 200) return uni.$showMsg
				console.log(res)
				// 一级分类
				this.cateList = res.message
				// 给二级分类赋值
				this.cateLevel2 = res.message[0].children
				console.log(this.cateLevel2)
			},
			// 点击事件
			activeChange(i){
				this.active = i
				this.cateLevel2 = this.cateList[i].children
				// console.log(this.cateLevel2)
				// 让scroll在1与0之间切换来重置滚动条
				this.scrollTop = this.scrollTop === 0 ? 1:0
			},
			// 点击分类跳转商品列表
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			// 点击搜索框跳转搜索页
			gotoSearch(){
				// console.log('ok')
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
				
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
}
.left-scroll-view{
	width: 120px;
	
	.left-scroll-view-item{
		background-color: #f7f7f7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;
		
		&.active{
			background-color: #ffffff;
			position: relative;
			
			&::before{
				content: '';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #c00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}
	}
}
.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;
		
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
